MESON Chess Problem Database

Problem Display
PID: 197389 (q2RrrQ1/3N4/2p1nP2/2PkpP2/pR2p3/KnP5/B2pPP2/6b1 w - - 0 1)

Tkachenko, Sergiy Ivanovich

Phenix, 1992

q2RrrQ1/3N4/2p1nP2/2PkpP2/pR2p3/KnP5/B2pPP2/6b1

#2

12 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd8
      • 2.Qxe6#
  • Tries
    • 1.Qg2?
      • threat
        • 2.Qxe4#
      • 1...Sxc5
        • 2.Sb6#
      • 1...Sd4
        • 2.c4#
      • 1...Sg5!
    • 1.f3?
      • threat
        • 2.fxe4#
      • 1...Bxc5
        • 2.Sb6#
      • 1...exf3
        • 2.e4#
      • 1...Bd4
        • 2.c4#
      • 1...e3!
  • Keys
    • 1.Bb1!
      • threat
        • 2.Bxe4#
      • 1...Sxc5
        • 2.Sb6#
      • 1...Sd4
        • 2.c4#
      • 1...e3
        • 2.Be4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(k);N_GUARD,XR(K)::QAB1(L),XS(i)
  • Tries
    • Try
      • Q(L);P_PINP(e)
      • Threat
        • QAB1(L),XP(e)
      • Vars
        • S(i);SBLOCK,XP(G)::R(K)+S(J),DCHECK
        • S(i);SBLOCK::P(E)
      • Refutation
        • S(i);
    • Try
      • P(C);
      • Threat
        • P(C),XP(e)
      • Vars
        • B(a);P_PINR(F),SBLOCK,XP(G)::R(K)+S(J),DCHECK
        • P(e);OGATE,XP(C)::P(B)
        • B(a);SBLOCK::P(E)
      • Refutation
        • P(e);
  • Actual
    • B(A);N_PINS(c),P_PINS(i)
    • Threat
      • B(A),XP(e)
    • Vars
      • S(c);SBLOCK,XP(G)::R(K)+S(J),DCHECK
      • S(c);SBLOCK::P(E)
      • P(e);::B(A)
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